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I stand corrected. Thank you. John (SeaRat)

If you want to be really safe, configure your dive computer to act like you are diving at an altitude of 4000 feet. Then dive the computer. I used to do that when I dove in Clear Lake, Oregon. I’d use the tables as if the dive were at 6000 feet, as after the dive we needed to drive back...

I was snorkeling at the Twin Bridges on the Siletz River with my then girl friend when she swam under the bridge, and began hooting and pointing. I swam over to her, and she said that there was a gun below the bridge. I did a surface dive, it was about 20 feet deep, and saw the rifle, picked...

Risk of Decompression Sickness (DCS) Johnny Conkin, PhD1, Jason R. Norcross, MS2, James H. Wessel III, MS2, Andrew F. J. Abercromby, PhD2, Jill S. Klein, MS2, Joseph P. Dervay, MD3 Michael L. Gernhardt, PhD3 1 Universities Space Research Association, Houston, TX 2 Wyle Science, Technology &...

DRW, I look at this entry a bit differently, as my training is in industrial hygiene. So I looked up in Google Scholar the topic "Rubber manufacturing and cancer," and got some very interesting results. From you photos, it does not appear that anyone was protecting themselves from exposures...

This one looks very much like the French La Spiro Champion Deluxe mask. SeaRat

Okay, I'm not going to read through all these posts. But it is apparent to me that this particular course is not one for you. That does not mean that scuba diving is not for you, but this is an accelerated course, meant to get a student out in minimum time. You did on-line testing, then a...

JCM, Sometimes divers go into diving not really understanding about breathing. This diagram from the U.S. Navy Diving Manual of 1970 shows lung volumes, and how we talk about them. Most people who get into diving now are not former competitive swimmers, and so don't understand that they have...

Just from looking at the parts diagram, I’d say that yes, this is probably convertible to a left-side LP hose. But, right side is pretty standard in the USA. SeaRat

I’ve just begun researching this, but already there are at least two ways for photographers and artists to protect their images from AI, “Glaze” and “Nightshade.” These programs create filters over an image which causes AI to have problems classifying the images. Here’s the Scientific American...

DoctorMike, That was a very interesting lecture. But it has me thinking of the value of film photography. I'm right now scanning slides that I made underwater on North Umpqua River for a book I'm writing on the underwater life in that river, and on the Winchester Dam Hydroelectric Project...

I have no experience with this kind of “down current.” I do have a lot of river diving in high currents, and know and use both swimming at 90 degrees to the current and grabbing the bottom to resist the currents. Both work, but in different ways. Swimming at 90 degrees to a current will get...

Okay, my 2 cents worth...this is only a problem for those using the Kraken and/or those using the VDH Duckbill Eliminator (DBE) insert into the bottom box. We did not have this problem when using a duckbill valve in the USD regulators. The Kraken is set up for only using the mushroom valve...

I had a steel tank which was just a bit longer than a steel 72. It was a 2475 psi stamped tank, and if my memory is correct, it was an 80 cubic foot tank (but that was a while back, like decades). So check the rated pressure, and if it is 2475, it may be a steel 80. SeaRat

Imla above has posted a wonderful set of parameters and an article from the Journal of Applied Physiology about the effects of work of breathing on a diver. I have some results from the U.S. Naval Experimental Diving Unit (Navy EDU) that evaluated the Conshelf XIV for its breathing performance...

A lot has been covered in this thread, but I'm going to let you in on a dive secret; dive logs are very valuable. I developed my own, and for a long time I filled them out with handwritten entries, along with diagrams. You can see several examples below, and these allow me to go back in time...

Depending upon the type of dry snorkel you have, it could be an advantage. Most dry snorkels these days (not the ping-pong ball variety) are designed to still be “dry” when a chop or wave washes temporarily over the snorkel. It will shed water down and out of the tube, or close the tube, in...

That first sentence is interesting to me, as sometimes there is no “common sense.” The brain is often tricked, or distracted, and that is why some here say to set the audible alarms on the dive computer. Those reminders are there for a reason. Concerning looking at the computer/SPG, one time...

Why are you buying new hoses for your regulator every time it's serviced? I have hoses that are 50+ years old, and still working fine. The new braided hoses probably are the ones being replaced, so replace them with the older style nylon-coated hoses that will last as long as the regulator...

I kinda figured that, but a lot of people think the larger knives are for fighting. I wanted to set the record straight. SeaRat